Failure Investigation Of A Helical Anchor Tie-Down System Supporting An Olympic Size Swimming Pool,
2013
CTLGroup, Columbia, MD
Failure Investigation Of A Helical Anchor Tie-Down System Supporting An Olympic Size Swimming Pool, Tom Labuda, Gene W. Corley, Michael Murphy
International Conference on Case Histories in Geotechnical Engineering
Adoption of new technologies and a push for money-saving value engineering designs may produce unpredictable and unwanted results. Particularly with shrinking budgets, proposals that reduce initial costs become more appealing. However, without careful consideration and implementation, cost-reducing measures can become more expensive in the end. This paper presents a case study of geostructural forensic analysis related to the failure of a helical anchor tie-down system selected to support an Olympic size swimming pool against hydrostatic uplift forces. The selection of helical anchors over a more expensive traditional anchorage system appeared to be a smart value engineering decision for the project’s …
Observation Of Stress Distribution On Instrumented Jet Grout Columns,
2013
Istanbul Technical University, Turkey
Observation Of Stress Distribution On Instrumented Jet Grout Columns, Berrak Teymur, Kaan Doğanışık
International Conference on Case Histories in Geotechnical Engineering
Jet grout columns are used widely in the last decade in Turkey especially in soil improvement projects. This study is intended to understand the behavior and stress distribution of jet grout columns installed in non-cohesive soils and are under vertical loads. Design capacity of jet grout column is examined by loading tests. Stress distribution was determined by strain gauges installed inside the jet grout columns. 35cm in diameter 8m long jet grout columns were constructed in silty sand. As measured by strain gages, the stress along the column extends deeper while load increases. According to the load test results, at …
Preliminary And Working Pile Load Tests In Simsima Limestone,
2013
Arup, New York, NY
Preliminary And Working Pile Load Tests In Simsima Limestone, Terrence Carroll, Stuart Hardy, Elliott Ting
International Conference on Case Histories in Geotechnical Engineering
A load testing program was undertaken to determine the working capacity of drilled shafts in Simsima Limestone, the predominant founding stratum in Doha, Qatar. The drilled shafts ranged from 500 mm to 1,500 mm in diameter and gained capacity from both side and base resistance within the Simsima Limestone. The weathering profile of the Simsima Limestone is complex with the degree of weathering likely to increase or decrease with depth. For the purposes of design, the limestone was characterized into three grades of weathering (A, B, and C) and the pile load testing program focused on testing each of these …
Slurry Caisson Problems And Correction In Chicago,
2013
AECOM, Vernon Hills, IL
Slurry Caisson Problems And Correction In Chicago, Tony A. Kiefer
International Conference on Case Histories in Geotechnical Engineering
The paper describes the design and construction history of 67-story and 45-story residential towers in Chicago which were constructed on straight-shaft caissons supported on the surface of dolomite bedrock at a design bearing pressure of 90 tons per square foot (tsf). The use of the 90 tsf bearing pressure was a first in Chicago and a strong departure from the Chicago code method of requiring rock sockets at least one to six feet deep along with permanent steel casing. The caissons were constructed by using polymer drilling slurry and tremie concrete pouring procedures. This paper presents a brief history and …
120 Years Of Caisson Foundations In Chicago,
2013
Case Foundation Company, Roselle, IL
120 Years Of Caisson Foundations In Chicago, Robert E. Schock, Eric J. Risberg
International Conference on Case Histories in Geotechnical Engineering
Chicago can be called the birthplace of the Skyscraper, and also tlle Drilled Shaft Foundation, both of which came into being late in the 19th century. The story of the Chicago Caisson begins with the presence of a thick deposit of soft clay beneath the City, and continues with the succession of building booms that have characterized the growth of the City over the last 140 years, beginning just after the Great Fire of 187 1. During that first boom, new tall structures were built so rapidly, and amid such profound geotechnical uncertainty, that the process of designing a successful …
A Report On The 2012 Seismic Sequence In Emilia (Northern Italy),
2013
University of Pisa, Italy
A Report On The 2012 Seismic Sequence In Emilia (Northern Italy), Diego C. F. Lo Presti, Mauro Sassu, Lucia Luzi, Francesca Pacor, Doriano Castaldini, Giovanni Tosatti, Claudia Meisina, Davide Zizioli, Francesco Zucca, Giuliano Rossi, Gilberto Saccorotti, Davide Piccinini
International Conference on Case Histories in Geotechnical Engineering
Since mid-May 2012, an energetic seismic sequence has affected the northern part of Italy and specifically a wide sector of the Po River Plain. The sequence has been dominated by two main events: a) Mw = 5.9 occurred near Finale Emilia on May 20th at a depth of 6.3 km, and b) Mw=5.8 occurred near Cavezzo on May 29th at a depth of 10.2 km (earthquake location are obtained Istituto Nazionale di Geofisica e Vulcanologia, http://iside.rm.ingv.it/). The effects of the two main shocks can be summarized as follows: - damage to infrastructures (roads, pipelines) essentially because of the occurrence of …
Dynamic Response Of Piles ─ Case Studies In India,
2013
Indian Institute of Technology Madras, India
Dynamic Response Of Piles ─ Case Studies In India, Boominathan Adimoolam, Krishna Kumar, Askar Zhussupbekov
International Conference on Case Histories in Geotechnical Engineering
Dynamic behavior of piles is strongly affected by the variation in the soil stiffness with depth and the interaction between the soil and the pile. The dynamic characteristics of the piles can be determined by using simple lumped mass models to complex finite element modeling. There is a need for experimental research, in particular large-scale field tests, to validate existing linear/nonlinear models, which are used to predict the dynamic stiffness and damping of the soil-pile system. The determination of dynamic characteristics of soil-pile system by full-scale lateral dynamic pile load testing is an important aspect in the design of pile …
The Design And Construction Of A Fast Track 16 Hectare, 18 M Deep Basement In Soft Clay In Singapore,
2013
Arup, Hong Kong
The Design And Construction Of A Fast Track 16 Hectare, 18 M Deep Basement In Soft Clay In Singapore, J. W. Pappin
International Conference on Case Histories in Geotechnical Engineering
Singapore’s newest integrated resort, Marina Bay Sands, was completed in record time and has garnered numerous engineering awards. The development sits on recent sand reclamation, which in turn rests on deep soft marine clay deposits. With an average excavation depth of around 18 meters, the 16 hectare (39 acre) waterfront development involved some of the largest marine clay excavation in Singapore. About 2.8 million cubic meters of fill and marine clay were excavated from the site equating to about 800 trucks a day for two years. To overcome the challenges of the bulk excavation and minimize shoring in difficult soil …
Shallow Foundations For Seismic Loads: Design Considerations,
2013
SIU Carbondale, IL
Shallow Foundations For Seismic Loads: Design Considerations, Vijay K. Puri, Shamsher Prakash
International Conference on Case Histories in Geotechnical Engineering
The seismic design of foundations for structures depends on dynamic bearing capacity, dynamic settlements and liquefaction susceptibility of soil. The dynamic bearing capacity problem has been attracting the attention of researchers during the last about fifty years. Till today (2013), there is no accepted dynamic bearing capacity theory. Most analysis for design of shallow foundations under seismic loads are based on the assumption that the failure zones in soil occur along a static failure surface. This is the pseudo-static approach. An attempt has been made in this paper to summarize the currently available information on design of shallow foundations under …
Improving The Structural Performance Of Heritage Buildings. A Comprehensive Romanian Experience.,
2013
Technical University of Civil Engineering, Romania
Improving The Structural Performance Of Heritage Buildings. A Comprehensive Romanian Experience., Ion Vlad
International Conference on Case Histories in Geotechnical Engineering
The paper is devoted to historical masonry buildings’ protection against the destructive influence of earthquakes. Experimental and analytical investigations were performed to verify an original methodology that was developed for improving the structural performance of such a building. The seismic retrofitting of the cultural heritage requires compliance with the severe restrictions of the Romanian legislation related to the preservation of the original artistic and structural features. The intervention on the building started with the understanding of the original idea that was in the mind of the first designer. To accomplish this desideratum, two studies have been performed: a historical study …
Field Instrumentation — The Link Between Theory And Practice In Geotechnical Engineering,
2013
Norwegian Geotechnical Institute, Norway
Field Instrumentation — The Link Between Theory And Practice In Geotechnical Engineering, E. Dibiagio
International Conference on Case Histories in Geotechnical Engineering
Geotechnical engineers work in two worlds: a theoretical world where ideas and events can be represented by numbers and calculated to as many decimal points as one desires, and a practical world where observations and events can only be described in general qualitative terms. Numerical data, the end product of measurement, provides a quantitative link between the two worlds of theory and practice. Professor Ralph B. Peck, the father of the Observational method in geotechnical engineering, recognized early in his professional career the importance of field instrumentation and performance monitoring in geotechnical engineering, and he did a lot to promote …
The Design Of Foundations For The World’S Tallest Buildings,
2013
AECOM, Vernon Hills, IL
The Design Of Foundations For The World’S Tallest Buildings, Clyde N. Baker, Tony A. Kiefer
International Conference on Case Histories in Geotechnical Engineering
The talk presents the essential requirements for the design of foundations for the world’s tallest buildings from a geotechnical perspective, discusses briefly the basic foundation types and several key principles to remember, including the need for close structural engineer and geotechnical engineer cooperation. The special in-situ testing and load testing techniques commonly used are also presented. International case histories where performance has been monitored are used to illustrate some of the basic points as well as to compare prediction with performance. As an additional feature, the experience of gradually increasing allowable bearing pressures in a given geology over a sufficient …
Geotechnical Lessons Learned From Earthquakes,
2013
University of California, Berkeley, CA
Geotechnical Lessons Learned From Earthquakes, Jonathan D. Bray, J. David Frost, Ellen M. Rathje
International Conference on Case Histories in Geotechnical Engineering
Geotechnical earthquake engineering is an experience-driven discipline. Field observations are particularly important because it is difficult to replicate in the laboratory, the characteristics and response of soil deposits built by nature over thousands of years. Further, much of the data generated by a major earthquake is perishable, so it is critical that it is collected soon after the event occurs. Detailed mapping and surveying of damaged and undamaged areas provides the data for the well-documented case histories that drive the development of many of the design procedures used by geotechnical engineers. Thus, documenting the key lessons learned from major earthquake …
Inconclusive Case Histories In Earthquake Geotechnics From Christchurch,
2013
National Technical University, Greece
Inconclusive Case Histories In Earthquake Geotechnics From Christchurch, George Gazetas
International Conference on Case Histories in Geotechnical Engineering
It is argued that there is still a need for further exploratory research to unravel the ultimate causes of unresolved case histories (especially those involving failures) in geotechnical earthquake engineering. Three specific examples motivated from the records of the four major seismic episodes that shook the city of Christchurch, New Zealand, in 2010 and 2011 are presented in detail. Peculiarities in these records call for an investigation of a number of plausible seismological and geotechnical contributing factors including source mechanics, forward-rupture directivity, 1Dsoil amplification, soil liquefaction, 2D basin amplification, and topographic aggravation.
Geotechnical Aspects Of Recent Extreme Floods In Pakistan; A Case History,
2013
University of Witwatersrand, South Africa
Geotechnical Aspects Of Recent Extreme Floods In Pakistan; A Case History, Sarfraz Ali, Fawad Akram, Abdul Qudoos Khan, Misba-Hafsa
International Conference on Case Histories in Geotechnical Engineering
Topographically, Pakistan comprises three major areas; Northern Highland Area, Indus Basin and Baluchistan Plateau. Its elevation varies from Mean sea Level (0 meter) at south to 8619 meters in the North at K-2 Peak. Northern Highland Area, generally sloping southwards includes Himalayan, Karakorum and Hindu-Kush ranges covering approximately an area of 155,831 square kilometers. Indus Basin stretches from foothills of Northern Highland Area to Arabian Sea in south covering approximately an area of 346,259 square kilometers. Baluchistan Plateau in the West and South comprises mountain ranges of Koh-i-Suleman, Kirther, blow-outs of coralline and lacustrine deposits along coastal belt and covers …
Dem Modelling Of Granular Materials During Cyclic Loading,
2013
University of Wollongong, Australia
Dem Modelling Of Granular Materials During Cyclic Loading, J. S. Vinod, Buddhima Indraratna, T. G. Sitharam
International Conference on Case Histories in Geotechnical Engineering
This paper summarises the potential of the Discrete Element Method (DEM) to simulate the behaviour of granular materials under cyclic loading conditions. DEM simulations were carried out on two different assemblies of granular particles (e.g. sand and ballast). It is shown that DEM is capable of simulating the cyclic behavior of granular materials (e.g. liquefaction, post liquefaction and cyclic densification of ballast) similar to the laboratory experiments. Moreover, an instrumented track at Bulli, NSW, Australia, was modeled using DEM to examine the lateral movement of granular materials, including the particle breakage during cyclic loading. The results of these simulations captured …
Cowboys Stadium Roof Arch Foundations — Revisited,
2013
Oklahoma State University, Stillwater, OK
Cowboys Stadium Roof Arch Foundations — Revisited, Garry H. Gregory
International Conference on Case Histories in Geotechnical Engineering
One of the challenging engineering aspects of the new Cowboys Stadium in Arlington, Texas was design of foundations for the retractable roof arches. The two arches, with a clear span of approximately 1,290 ft, produce a lateral thrust of approximately 19,500 kips at each foundation. The Author was on a consultancy board related to foundation design with Mr. Clyde Baker during the design phase of the project. Design criteria included a maximum allowable deflection of approximately 0.5 inches for the foundations. Adding to the complexity was the varying geologic conditions at each arch foundation location. After eliminating numerous options, the …
Luncheon To Honor Dr. Shamsher Prakash,
2013
Missouri University of Science and Technology
Luncheon To Honor Dr. Shamsher Prakash, Multiple Participants
International Conference on Case Histories in Geotechnical Engineering
No abstract provided.
Caverns In The Ground Under Thermal Power Plant, Caused By Static Electricity And Chemically Aggressive Water,
2013
University of Transport “Todor Kableshkov”, Bulgaria
Caverns In The Ground Under Thermal Power Plant, Caused By Static Electricity And Chemically Aggressive Water, Chavdar Vassilev Kolev, Gergana Vassileva Gevezova
International Conference on Case Histories in Geotechnical Engineering
A relatively rare phenomenon is discussed in the bellow report. Some deformations and subsidences of the road pavement and of some facilities of the plant for chemically contaminated water in Sofia Thermal Power Plant are examined here. A danger of demolishing of large ponds of sediment water, as well as of incidences with the high steel poles for high voltage were highly possible to happen if current situation is retained. Various studies with this topic have been conducted - geophysical, such as geo-radar, electro-tomographical and drilling ones (with short boreholes). Laboratory and field studies of the ground have been also …
Design And Construction Of Compaction Grouting For Foundation Soil Improvements,
2013
GeoEngineers, Inc., Redmond, WA
Design And Construction Of Compaction Grouting For Foundation Soil Improvements, King H. Chin, Heidi P. Disla, Bob Cote
International Conference on Case Histories in Geotechnical Engineering
This paper presents the design and construction of compaction grouting work completed for a tank replacement project in Portland, Oregon. The project site is located along the west bank of the Willamette River. The subsurface soils at the project site were determined to be highly susceptible to soil liquefaction and lateral spreading under a design earthquake event per the building code. Compaction grouting was designed and constructed to strengthen the foundation soils supporting the new steel tank that is 115 feet in diameter and 40 feet in height. The design of the compaction grouting was completed using the design guidelines …
